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25-01-2024
Mathematics

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What is the numerical value of (2.1 × 10⁴)(4.0 × 10⁻²)?
A. 8.4 × 10⁻⁸
B. None of these
C. 8.4
D. 8.4 × 10⁻²
E. 8.4 × 10²

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